Autonomous System
AS174 · Cogent Communications, LLC
Overview
AS174 is announced on the Internet: RIPE RIS route collectors currently see 3,949 IPv4 prefixes and 530 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 36,332,544 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 213 upstream neighbours (transit providers or peers) and 6,513 downstream neighbours (customers or networks it carries). Its most visible upstreams are Arelion Sweden AB (AS1299), Level 3 Parent, LLC (AS3356), and TELECOM ITALIA SPARKLE S.p.A. (AS6762). AS174 was assigned by ARIN, and its registration country is United States.
Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 16, 2026 at 6:46 PM UTC. This page is refreshed at most every 12 hours.
Go further
The trace goes to 38.0.0.1, the first address of 38.0.0.0/8. An address picked inside a prefix may not answer (nothing listens there, or the network filters probes): the trace then shows the path up to the last network that replies.
Announced prefixes
IPv4 prefixes (3,949 prefixes)
| Prefix | Addresses |
|---|---|
| 2.58.4.0/22 | 1,024 |
| 5.83.219.0/24 | 256 |
| 5.157.72.0/21 | 2,048 |
| 8.24.64.0/23 | 512 |
| 8.24.72.0/23 | 512 |
| 16.5.118.0/23 | 512 |
| 16.5.168.0/23 | 512 |
| 16.5.170.0/23 | 512 |
| 16.5.198.0/24 | 256 |
| 23.26.130.0/24 | 256 |
| 23.135.116.0/24 | 256 |
| 23.135.124.0/24 | 256 |
| 23.141.196.0/24 | 256 |
| 23.141.204.0/24 | 256 |
| 23.141.212.0/24 | 256 |
| 23.141.228.0/24 | 256 |
| 23.142.100.0/24 | 256 |
| 23.144.28.0/24 | 256 |
| 23.144.60.0/24 | 256 |
| 23.146.76.0/24 | 256 |
| 23.146.116.0/24 | 256 |
| 23.148.44.0/24 | 256 |
| 23.148.60.0/24 | 256 |
| 23.148.68.0/24 | 256 |
| 23.148.92.0/24 | 256 |
| 23.148.116.0/24 | 256 |
| 23.148.124.0/24 | 256 |
| 23.148.164.0/24 | 256 |
| 23.151.196.0/24 | 256 |
| 23.161.96.0/24 | 256 |
| 23.167.168.0/24 | 256 |
| 23.227.92.0/22 | 1,024 |
| 23.234.144.0/22 | 1,024 |
| 23.237.93.0/24 | 256 |
| 37.34.88.0/21 | 2,048 |
| 37.49.150.0/24 | 256 |
| 38.0.0.0/8 | 16,777,216 |
| 38.3.128.0/24 | 256 |
| 38.3.180.0/24 | 256 |
| 38.3.181.0/24 | 256 |
| 38.3.182.0/24 | 256 |
| 38.3.183.0/24 | 256 |
| 38.5.16.0/24 | 256 |
| 38.7.64.0/20 | 4,096 |
| 38.7.96.0/24 | 256 |
| 38.7.97.0/24 | 256 |
| 38.9.32.0/24 | 256 |
| 38.9.33.0/24 | 256 |
| 38.9.210.0/23 | 512 |
| 38.9.210.0/24 | 256 |
| 38.9.211.0/24 | 256 |
| 38.10.160.0/24 | 256 |
| 38.10.161.0/24 | 256 |
| 38.10.162.0/24 | 256 |
| 38.10.163.0/24 | 256 |
| 38.10.164.0/24 | 256 |
| 38.10.165.0/24 | 256 |
| 38.10.166.0/24 | 256 |
| 38.10.167.0/24 | 256 |
| 38.10.168.0/24 | 256 |
| 38.10.169.0/24 | 256 |
| 38.10.170.0/24 | 256 |
| 38.10.171.0/24 | 256 |
| 38.10.172.0/24 | 256 |
| 38.10.173.0/24 | 256 |
| 38.10.174.0/24 | 256 |
| 38.10.175.0/24 | 256 |
| 38.15.0.0/19 | 8,192 |
| 38.15.184.0/21 | 2,048 |
| 38.17.40.0/23 | 512 |
| 38.17.42.0/23 | 512 |
| 38.18.160.0/19 | 8,192 |
| 38.18.236.0/22 | 1,024 |
| 38.19.12.0/24 | 256 |
| 38.19.48.0/24 | 256 |
| 38.19.172.0/22 | 1,024 |
| 38.19.208.0/24 | 256 |
| 38.19.209.0/24 | 256 |
| 38.19.210.0/24 | 256 |
| 38.19.211.0/24 | 256 |
| 38.19.214.0/24 | 256 |
| 38.19.224.0/23 | 512 |
| 38.19.224.0/24 | 256 |
| 38.19.225.0/24 | 256 |
| 38.19.234.0/23 | 512 |
| 38.19.234.0/24 | 256 |
| 38.19.235.0/24 | 256 |
| 38.19.236.0/24 | 256 |
| 38.19.237.0/24 | 256 |
| 38.19.251.0/24 | 256 |
| 38.20.130.0/23 | 512 |
| 38.20.138.0/24 | 256 |
| 38.20.139.0/24 | 256 |
| 38.20.160.0/20 | 4,096 |
| 38.20.228.0/24 | 256 |
| 38.21.64.0/24 | 256 |
| 38.21.65.0/24 | 256 |
| 38.21.66.0/24 | 256 |
| 38.21.67.0/24 | 256 |
| 38.22.10.0/24 | 256 |
Showing the first 100 of 3,949, in address order. Complete list on RIPEstat
IPv6 prefixes (530 prefixes)
| Prefix |
|---|
| 2001:550::/32 |
| 2001:550:1:c::/64 |
| 2001:550:1:100::/56 |
| 2001:550:1:300::/64 |
| 2001:550:1:301::/64 |
| 2001:550:1:304::/64 |
| 2001:550:100:8::/64 |
| 2001:550:100:9::/64 |
| 2001:550:104::/48 |
| 2001:550:107::/48 |
| 2001:550:108::/48 |
| 2001:550:201::/48 |
| 2001:550:202::/48 |
| 2001:550:203::/48 |
| 2001:550:204::/48 |
| 2001:550:205::/48 |
| 2001:550:206::/48 |
| 2001:550:209::/48 |
| 2001:550:20a::/48 |
| 2001:550:20b::/48 |
| 2001:550:302::/48 |
| 2001:550:303::/48 |
| 2001:550:304::/48 |
| 2001:550:306::/48 |
| 2001:550:307::/48 |
| 2001:550:308::/48 |
| 2001:550:309::/48 |
| 2001:550:30c::/48 |
| 2001:550:30d::/48 |
| 2001:550:402::/48 |
| 2001:550:407::/48 |
| 2001:550:408::/48 |
| 2001:550:40a::/48 |
| 2001:550:40b::/48 |
| 2001:550:40c::/48 |
| 2001:550:40e::/48 |
| 2001:550:40f::/48 |
| 2001:550:410::/48 |
| 2001:550:412::/48 |
| 2001:550:602::/48 |
| 2001:550:606::/48 |
| 2001:550:702::/48 |
| 2001:550:800:2::/64 |
| 2001:550:800:100::/56 |
| 2001:550:801::/48 |
| 2001:550:802::/48 |
| 2001:550:803::/51 |
| 2001:550:803:2000::/51 |
| 2001:550:803:6000::/51 |
| 2001:550:804::/48 |
| 2001:550:805::/48 |
| 2001:550:905::/48 |
| 2001:550:906::/48 |
| 2001:550:908::/48 |
| 2001:550:909::/48 |
| 2001:550:90b::/48 |
| 2001:550:911::/48 |
| 2001:550:912::/48 |
| 2001:550:913::/48 |
| 2001:550:a00::/48 |
| 2001:550:a02::/48 |
| 2001:550:a04::/48 |
| 2001:550:a06::/48 |
| 2001:550:a07::/48 |
| 2001:550:a09::/48 |
| 2001:550:a0a::/48 |
| 2001:550:a0b::/48 |
| 2001:550:a0c::/48 |
| 2001:550:a0d::/48 |
| 2001:550:a0e::/49 |
| 2001:550:a0e:8000::/49 |
| 2001:550:a0f::/48 |
| 2001:550:a10::/48 |
| 2001:550:a11::/48 |
| 2001:550:a12::/48 |
| 2001:550:a13::/48 |
| 2001:550:a15::/48 |
| 2001:550:a16::/48 |
| 2001:550:a19::/48 |
| 2001:550:a1a::/48 |
| 2001:550:a1b::/48 |
| 2001:550:a1c::/48 |
| 2001:550:a1d::/48 |
| 2001:550:a20::/48 |
| 2001:550:a21::/48 |
| 2001:550:a22::/48 |
| 2001:550:a23::/48 |
| 2001:550:a24::/48 |
| 2001:550:a25::/48 |
| 2001:550:a26::/48 |
| 2001:550:a28::/48 |
| 2001:550:a29::/48 |
| 2001:550:a2a::/48 |
| 2001:550:b01::/48 |
| 2001:550:c01::/48 |
| 2001:550:c02::/48 |
| 2001:550:c03::/48 |
| 2001:550:c04::/48 |
| 2001:550:c05::/48 |
| 2001:550:c07::/48 |
Showing the first 100 of 530, in address order. Complete list on RIPEstat
Neighbours
Upstreams (transit or peers) (213)
| AS | Network | Visibility |
|---|---|---|
| AS1299 | Arelion Sweden AB | 354,591 |
| AS3356 | Level 3 Parent, LLC | 128,811 |
| AS6762 | TELECOM ITALIA SPARKLE S.p.A. | 128,651 |
| AS327727 | C-Squared Limited | 128,065 |
| AS6453 | TATA COMMUNICATIONS (AMERICA) INC | 95,711 |
| AS6830 | LibertyGlobal Liberty Global Europe Holding B.V. | 89,848 |
| AS38008 | Aperture Science Limited | 89,521 |
| AS3491 | PCCW Global (HK) Ltd. | 86,357 |
| AS200612 | GulfBridgeInternational Gulf Bridge International Inc. | 86,205 |
| AS2914 | NTT America, Inc. | 78,388 |
| AS61049 | Exascale Ltd | 77,845 |
| AS34549 | - | 76,290 |
| AS50673 | Serverius Holding B.V. | 74,673 |
| AS3257 | GTT Communications Inc. | 73,810 |
| AS6461 | Zayo Bandwidth | 70,385 |
| AS199524 | G-Core Labs S.A. | 67,329 |
| AS39351 | 31173 Services AB | 62,643 |
| AS1764 | Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH | 54,592 |
| AS198978 | - | 54,010 |
| AS2497 | Internet Initiative Japan Inc. | 52,124 |
| AS971 | PureVoltage Hosting Inc. | 51,061 |
| AS132825 | - | 47,246 |
| AS14840 | BR.Digital Telecom | 41,669 |
| AS37282 | Main one Cable Company Nigeria Limited | 41,292 |
| AS12577 | MMC GmbH | 39,911 |
| AS29075 | IELO-LIAZO SERVICES SAS | 39,474 |
| AS34927 | iFog GmbH | 38,812 |
| AS41327 | Fiber Telecom S.p.A. | 38,627 |
| AS6057 | Administracion Nacional de Telecomunicaciones | 36,986 |
| AS24961 | WIIT AG | 36,640 |
The 30 most visible of 213.
Downstreams (customers) (6,513)
| AS | Network | Visibility |
|---|---|---|
| AS3356 | Level 3 Parent, LLC | 215,653 |
| AS1299 | Arelion Sweden AB | 147,687 |
| AS6453 | TATA COMMUNICATIONS (AMERICA) INC | 78,606 |
| AS13786 | Seabras 1 USA, LLC | 72,595 |
| AS7018 | AT&T Enterprises, LLC | 67,802 |
| AS23520 | Columbus Networks USA, Inc. | 60,268 |
| AS3257 | GTT Communications Inc. | 57,791 |
| AS3491 | PCCW Global (HK) Ltd. | 47,652 |
| AS6762 | TELECOM ITALIA SPARKLE S.p.A. | 43,868 |
| AS12389 | PJSC Rostelecom | 42,316 |
| AS6461 | Zayo Bandwidth | 41,818 |
| AS14840 | BR.Digital Telecom | 41,601 |
| AS4826 | Vocus Connect International Backbone | 39,967 |
| AS38193 | Transworld Associates (Pvt.) Ltd. | 38,059 |
| AS61568 | ALOO TELECOM - FSF TECNOLOGIA SA | 37,966 |
| AS12956 | TELEFONICA GLOBAL SOLUTIONS SL | 37,519 |
| AS7922 | Comcast Cable Communications, LLC | 35,156 |
| AS701 | Verizon Business | 34,926 |
| AS7195 | EDGEUNO S.A.S | 34,245 |
| AS60068 | Datacamp Limited | 31,894 |
| AS20473 | The Constant Company, LLC | 31,044 |
| AS52320 | GlobeNet Cabos Submarinos Colombia, S.A.S. | 29,899 |
| AS52468 | UFINET PANAMA S.A. | 27,086 |
| AS9498 | BHARTI Airtel Ltd. | 26,476 |
| AS5511 | Opentransit Orange S.A. | 25,390 |
| AS147094 | PT. MITRA VISIONER PRATAMA | 25,282 |
| AS38195 | Superloop | 24,032 |
| AS2914 | NTT America, Inc. | 23,053 |
| AS55410 | Vodafone Idea Ltd | 22,806 |
| AS5650 | Frontier Communications of America, Inc. | 22,397 |
The 30 most visible of 6,513.
56 more neighbours appear on both sides of this network depending on the path, so they are counted in neither list.
Visibility is RIPEstat's count of how often the route collectors observed the link. It compares neighbours with each other; it is not a traffic volume.
How to read this page
An Autonomous System (AS) is a network run under one routing policy: an internet provider, a cloud, a content network, a university. Each one has a number, its ASN, assigned by a regional registry (ARIN, RIPE NCC, APNIC, LACNIC, AFRINIC), and uses BGP, the protocol networks use to tell each other where addresses are, to announce the blocks of addresses it delivers to.
A prefix such as 203.0.113.0/24 is a block of addresses: the number after the slash says how many bits are fixed, so a /24 holds 256 IPv4 addresses and a /16 holds 65,536. Networks often announce a large block and smaller pieces of it at the same time, which is why the address total counts each address once.
Neighbours come from the paths themselves. A network that appears just before this one in a path, on the collector's side, is an upstream: a transit provider or a peer. One that appears just after it is a downstream, usually a customer. Peering at an internet exchange also shows up as an upstream, so the upstream list is not a list of paid transit.
The data comes from RIPEstat, run by the RIPE NCC, which gathers the routing tables of hundreds of networks through its RIS route collectors. This page reads it when it is visited and keeps it for 12 hours at most; the BGP viewer reads it live.